十七世纪三十年代,比利时有一位名叫赫尔蒙的先生,有一天在郊外散步,他忽然想:这些植物为什么会长呢?植物是吃了什么东西长起来的?那些东西又是从哪里来的呢?他百思不解,于是决定动手做试验。他用一个大瓦钵装上两百磅烘干的泥土,然后用水浇湿,插进一段柳树枝,重五磅。栽插以后,他将瓦钵用镀过的铁板密封盖好,只留 In the 1730s, a Belgian gentleman named Hermon walked one day in the suburbs. Suddenly he thought: Why did these plants grow and plants grew up? What kind of things were grown from Where did he come from? He puzzled, so decided to experiment. He mounted two hundred pounds of dry soil in a large bowl of pottery, and then wet it with water, inserting a willow branch and weighing five pounds. After planting, he sealed the pot with a plated iron plate, leaving only